A cylindrical stone mix concrete beam of diameter D 0.5 m initially at Ti=20 C i

Question

A cylindrical stone mix concrete beam of diameter D

0.5 m initially at Ti=20 C is exposed to hot gases at

T=500 C. The convection coefficient is h=10 W/m2 K.

(a) Determine the centerline temperature of the beam

after an exposure time of t =6 h.

(b) Determine the centerline temperature of a second

beam that is of the same size and exposed to the same

conditions as in part (a) but fabricated of lightweight

aggregate concrete with density = 1495 kg/m3,

thermal conductivity k =0.789 W/mK, and specific

heat cp = 880 J/kg K.

Explanation / Answer

http://www.chegg.com/homework-help/introduction-to-heat-transfer-5th-edition-chapter-5-problem-65p-solution-9780471457275

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